Exactly what Are Bifocal Contact Lenses And How They Work Contact lenses are offered as bifocal, trifocal and progressive. Bifocal contact lenses are the ideal choice for those who need reading glasses and find it annoying to change glasses throughout the day as they look after a person's near vision demands, making it simple to read and see nearby objects plainly. They are available in different choices, comprising of gas permeable and soft lens materials, in addition to offering the flexibility of disposable lens and replacement lens. The disposable sort can be discarded after a specific period while the replaceable type are simply replaced at the advised frequency. Basically, bifocal contact lenses are prescribed for those with Presbyopia, a natural condition that develops due to age. With bifocal, two prescribeds are on the same lens. So how do they work? Based on the lens' design, bifocals can work in a number of ways, Ron Gallemore Retina Macula Institute. The design can be alternating vision where the pupil has to handle two powers and synchronised vision where the eye must view distance and near powers at once. The eye manages to choose the right power depending upon exactly what it needs to see.
In concentric design, distance power is at the center with near and distance power in the outer rings. In the aspheric design, both the near and distance power are in front of the pupil. What about alternating bifocal contact lenses? You can see the demarcation between the distance power on near and top power under it. Bifocal lenses, like eyeglasses, likewise remain in place when you look downward or up correcting your vision.
The concentric ring design has a prescribed at the center with a couple of rings with power around it. There will be at least two rings in the pupil location, changing as the pupil contracts or expands with changing light conditions. These can be stiff or soft with varying locations for the power. Although these contact lenses have been around for a while, advances in the innovation have actually made it more effective than previously, offering the patient more selection. Finding the right option for you Even if you just need reading glasses, you can get bifocal contact lenses with only the reading prescription, making it convenient. Even people with astigmatism can obtain GP lenses, which stay in place and help correct the vision. To identify the right type, your optician will take into account the size of your pupil and near vision power. Different designs may be suggested before the right one is found and many opticians offer free trials. It is best to consult with a qualified and experienced eye doctor to diagnose your needs and find the best suitable for you. Bifocal contact lenses are the ideal selection for those who need reading glasses and discover it irritating to switch glasses throughout the day as they take care of a person's near vision requirements, making it easy to review and see neighboring items plainly. They are offered in various options, making up of gas permeable and soft lens products, in addition to providing the versatility of non reusable lens and replacement lens. The design can be rotating vision where the student has to deal with two powers and simultaneous vision where the eye must view distance and near powers at once. In concentric design, distance power is at the facility with near and distance power in the outer rings. You can see the demarcation between the distance power on near and top power under it.
Published on Aug 22, 2013
Dr. Ron P Gallemore, MD, California, CA, Los Angeles, Ophthalmology , 321 North Larchmont Boulevard 1020, (323) 464-9393. Get a FREE Backgro...